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10 questions
52 + 51=
53
103
51
65
43 + 41=
43
1
21
4
95−95=
0
1
5
3
31+21=
52
65
35
1
72+83=
5637
31
5610
5343
92+61=
187
121
185
1
85−41=
83
21
22
1
43−21=
21
41
1
43
1211−32=
113
41
31
127
653−421=
2101
51
3103
151
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